So many people's 9/11 stories involve watching it on TV. Mine didn't because we were worried students would see their parents jump from the Towers live.
To give you a sense of proximity: The ash cloud from the attack lingered for days, until rain finally washed it down.
The next day, I got off the school bus, and my sneaker left a print in it. I remember thinking "I just stepped in the remains of 3,000 people." And then... had to go to class.